Just for cross-reference: https://github.com/NodeBB/NodeBB/issues/2060
I think I agree with the idea and that it would be useful although I don't see ourselves prioritizing this feature for the next major version at least.
esiao created this issue in NodeBB/NodeBB
Ability to associate a tags to a category, then filter w/in that category using that tag
I will probably look into this for 0.3.1. Also see https://github.com/designcreateplay/NodeBB/issues/563
cnvo created this issue in designcreateplay/NodeBB
Saving uploaded images to disk vs Imgur